.popup-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.5);}.popup{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:#fff;padding:5rem;border-radius:8px;box-shadow:0 0 10px rgba(0,0,0,0.2);z-index:1000;}.popup-content{text-align:center;}.popup .close{position:absolute;top:10px;right:10px;font-size:20px;cursor:pointer;color:#333;}